Hi,
i am trying to ugrade my wordpress from 3.1 to 3.2 which give a error as..

Fatal error: Cannot run code from this file in conjunction with non encoded files in /home/wwwchtnath/public_html/wp-includes/version.php on line 284

i also am having trouble with adding new posts and pages.. with following error:

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, webmaster@chetanayoganepal.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Apache/2.2.22 (Unix) mod_ssl/2.2.22 OpenSSL/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 Server at chetanayoganepal.com Port 80

Try:
- switching to the Twenty Eleven theme by renaming your current theme's folder inside wp-content/themes and adding "-old" to the end of the folder name using FTP or whatever file management application your host provides.